1 /* Target-vector operations for controlling win32 child processes, for GDB.
3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007 Free Software Foundation, Inc.
6 Contributed by Cygnus Solutions, A Red Hat Company.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* Originally by Steve Chamberlain, sac@cygnus.com */
25 /* We assume we're being built with and will be used for cygwin. */
28 #include "frame.h" /* required by inferior.h */
31 #include "exceptions.h"
34 #include "completer.h"
38 #include <sys/types.h>
43 #include <sys/cygwin.h>
49 #include "gdb_obstack.h"
50 #include "gdb_string.h"
51 #include "gdbthread.h"
53 #include <sys/param.h>
58 #include "xml-support.h"
60 #include "i386-tdep.h"
61 #include "i387-tdep.h"
63 #include "i386-cygwin-tdep.h"
65 static struct target_ops win32_ops
;
67 /* The starting and ending address of the cygwin1.dll text segment. */
68 static bfd_vma cygwin_load_start
;
69 static bfd_vma cygwin_load_end
;
71 static int have_saved_context
; /* True if we've saved context from a cygwin signal. */
72 static CONTEXT saved_context
; /* Containes the saved context from a cygwin signal. */
74 /* If we're not using the old Cygwin header file set, define the
75 following which never should have been in the generic Win32 API
76 headers in the first place since they were our own invention... */
77 #ifndef _GNU_H_WINDOWS_H
80 FLAG_TRACE_BIT
= 0x100,
81 CONTEXT_DEBUGGER
= (CONTEXT_FULL
| CONTEXT_FLOATING_POINT
)
84 #include <sys/procfs.h>
87 #define CONTEXT_DEBUGGER_DR CONTEXT_DEBUGGER | CONTEXT_DEBUG_REGISTERS \
88 | CONTEXT_EXTENDED_REGISTERS
90 static unsigned dr
[8];
91 static int debug_registers_changed
;
92 static int debug_registers_used
;
94 /* The string sent by cygwin when it processes a signal.
95 FIXME: This should be in a cygwin include file. */
96 #ifndef _CYGWIN_SIGNAL_STRING
97 #define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
100 #define CHECK(x) check (x, __FILE__,__LINE__)
101 #define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
102 #define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
103 #define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
104 #define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
106 static void win32_stop (void);
107 static int win32_win32_thread_alive (ptid_t
);
108 static void win32_kill_inferior (void);
110 static enum target_signal last_sig
= TARGET_SIGNAL_0
;
111 /* Set if a signal was received from the debugged process */
113 /* Thread information structure used to track information that is
114 not available in gdb's thread structure. */
115 typedef struct thread_info_struct
117 struct thread_info_struct
*next
;
128 static thread_info thread_head
;
130 /* The process and thread handles for the above context. */
132 static DEBUG_EVENT current_event
; /* The current debug event from
134 static HANDLE current_process_handle
; /* Currently executing process */
135 static thread_info
*current_thread
; /* Info on currently selected thread */
136 static DWORD main_thread_id
; /* Thread ID of the main thread */
138 /* Counts of things. */
139 static int exception_count
= 0;
140 static int event_count
= 0;
141 static int saw_create
;
144 static int new_console
= 0;
145 static int cygwin_exceptions
= 0;
146 static int new_group
= 1;
147 static int debug_exec
= 0; /* show execution */
148 static int debug_events
= 0; /* show events from kernel */
149 static int debug_memory
= 0; /* show target memory accesses */
150 static int debug_exceptions
= 0; /* show target exceptions */
151 static int useshell
= 0; /* use shell for subprocesses */
153 /* This vector maps GDB's idea of a register's number into an address
154 in the win32 exception context vector.
156 It also contains the bit mask needed to load the register in question.
158 One day we could read a reg, we could inspect the context we
159 already have loaded, if it doesn't have the bit set that we need,
160 we read that set of registers in using GetThreadContext. If the
161 context already contains what we need, we just unpack it. Then to
162 write a register, first we have to ensure that the context contains
163 the other regs of the group, and then we copy the info in and set
166 #define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
167 static const int mappings
[] =
169 context_offset (Eax
),
170 context_offset (Ecx
),
171 context_offset (Edx
),
172 context_offset (Ebx
),
173 context_offset (Esp
),
174 context_offset (Ebp
),
175 context_offset (Esi
),
176 context_offset (Edi
),
177 context_offset (Eip
),
178 context_offset (EFlags
),
179 context_offset (SegCs
),
180 context_offset (SegSs
),
181 context_offset (SegDs
),
182 context_offset (SegEs
),
183 context_offset (SegFs
),
184 context_offset (SegGs
),
185 context_offset (FloatSave
.RegisterArea
[0 * 10]),
186 context_offset (FloatSave
.RegisterArea
[1 * 10]),
187 context_offset (FloatSave
.RegisterArea
[2 * 10]),
188 context_offset (FloatSave
.RegisterArea
[3 * 10]),
189 context_offset (FloatSave
.RegisterArea
[4 * 10]),
190 context_offset (FloatSave
.RegisterArea
[5 * 10]),
191 context_offset (FloatSave
.RegisterArea
[6 * 10]),
192 context_offset (FloatSave
.RegisterArea
[7 * 10]),
193 context_offset (FloatSave
.ControlWord
),
194 context_offset (FloatSave
.StatusWord
),
195 context_offset (FloatSave
.TagWord
),
196 context_offset (FloatSave
.ErrorSelector
),
197 context_offset (FloatSave
.ErrorOffset
),
198 context_offset (FloatSave
.DataSelector
),
199 context_offset (FloatSave
.DataOffset
),
200 context_offset (FloatSave
.ErrorSelector
)
202 context_offset (ExtendedRegisters
[10*16]),
203 context_offset (ExtendedRegisters
[11*16]),
204 context_offset (ExtendedRegisters
[12*16]),
205 context_offset (ExtendedRegisters
[13*16]),
206 context_offset (ExtendedRegisters
[14*16]),
207 context_offset (ExtendedRegisters
[15*16]),
208 context_offset (ExtendedRegisters
[16*16]),
209 context_offset (ExtendedRegisters
[17*16]),
211 context_offset (ExtendedRegisters
[24])
214 #undef context_offset
216 /* This vector maps the target's idea of an exception (extracted
217 from the DEBUG_EVENT structure) to GDB's idea. */
219 struct xlate_exception
222 enum target_signal us
;
225 static const struct xlate_exception
228 {EXCEPTION_ACCESS_VIOLATION
, TARGET_SIGNAL_SEGV
},
229 {STATUS_STACK_OVERFLOW
, TARGET_SIGNAL_SEGV
},
230 {EXCEPTION_BREAKPOINT
, TARGET_SIGNAL_TRAP
},
231 {DBG_CONTROL_C
, TARGET_SIGNAL_INT
},
232 {EXCEPTION_SINGLE_STEP
, TARGET_SIGNAL_TRAP
},
233 {STATUS_FLOAT_DIVIDE_BY_ZERO
, TARGET_SIGNAL_FPE
},
237 check (BOOL ok
, const char *file
, int line
)
240 printf_filtered ("error return %s:%d was %lu\n", file
, line
,
244 /* Find a thread record given a thread id.
245 If get_context then also retrieve the context for this
248 thread_rec (DWORD id
, int get_context
)
252 for (th
= &thread_head
; (th
= th
->next
) != NULL
;)
255 if (!th
->suspend_count
&& get_context
)
257 if (get_context
> 0 && id
!= current_event
.dwThreadId
)
258 th
->suspend_count
= SuspendThread (th
->h
) + 1;
259 else if (get_context
< 0)
260 th
->suspend_count
= -1;
261 th
->reload_context
= 1;
269 /* Add a thread to the thread list */
271 win32_add_thread (DWORD id
, HANDLE h
)
275 if ((th
= thread_rec (id
, FALSE
)))
278 th
= XZALLOC (thread_info
);
281 th
->next
= thread_head
.next
;
282 thread_head
.next
= th
;
283 add_thread (pid_to_ptid (id
));
284 /* Set the debug registers for the new thread in they are used. */
285 if (debug_registers_used
)
287 /* Only change the value of the debug registers. */
288 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
289 CHECK (GetThreadContext (th
->h
, &th
->context
));
290 th
->context
.Dr0
= dr
[0];
291 th
->context
.Dr1
= dr
[1];
292 th
->context
.Dr2
= dr
[2];
293 th
->context
.Dr3
= dr
[3];
294 /* th->context.Dr6 = dr[6];
295 FIXME: should we set dr6 also ?? */
296 th
->context
.Dr7
= dr
[7];
297 CHECK (SetThreadContext (th
->h
, &th
->context
));
298 th
->context
.ContextFlags
= 0;
303 /* Clear out any old thread list and reintialize it to a
306 win32_init_thread_list (void)
308 thread_info
*th
= &thread_head
;
310 DEBUG_EVENTS (("gdb: win32_init_thread_list\n"));
312 while (th
->next
!= NULL
)
314 thread_info
*here
= th
->next
;
315 th
->next
= here
->next
;
316 (void) CloseHandle (here
->h
);
319 thread_head
.next
= NULL
;
322 /* Delete a thread from the list of threads */
324 win32_delete_thread (DWORD id
)
329 printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (pid_to_ptid (id
)));
330 delete_thread (pid_to_ptid (id
));
332 for (th
= &thread_head
;
333 th
->next
!= NULL
&& th
->next
->id
!= id
;
337 if (th
->next
!= NULL
)
339 thread_info
*here
= th
->next
;
340 th
->next
= here
->next
;
341 CloseHandle (here
->h
);
347 do_win32_fetch_inferior_registers (struct regcache
*regcache
, int r
)
349 char *context_offset
= ((char *) ¤t_thread
->context
) + mappings
[r
];
353 return; /* Windows sometimes uses a non-existent thread id in its
356 if (current_thread
->reload_context
)
358 #ifdef __COPY_CONTEXT_SIZE
359 if (have_saved_context
)
361 /* Lie about where the program actually is stopped since cygwin has informed us that
362 we should consider the signal to have occurred at another location which is stored
363 in "saved_context. */
364 memcpy (¤t_thread
->context
, &saved_context
, __COPY_CONTEXT_SIZE
);
365 have_saved_context
= 0;
370 thread_info
*th
= current_thread
;
371 th
->context
.ContextFlags
= CONTEXT_DEBUGGER_DR
;
372 GetThreadContext (th
->h
, &th
->context
);
373 /* Copy dr values from that thread. */
374 dr
[0] = th
->context
.Dr0
;
375 dr
[1] = th
->context
.Dr1
;
376 dr
[2] = th
->context
.Dr2
;
377 dr
[3] = th
->context
.Dr3
;
378 dr
[6] = th
->context
.Dr6
;
379 dr
[7] = th
->context
.Dr7
;
381 current_thread
->reload_context
= 0;
384 #define I387_ST0_REGNUM I386_ST0_REGNUM
386 if (r
== I387_FISEG_REGNUM
)
388 l
= *((long *) context_offset
) & 0xffff;
389 regcache_raw_supply (regcache
, r
, (char *) &l
);
391 else if (r
== I387_FOP_REGNUM
)
393 l
= (*((long *) context_offset
) >> 16) & ((1 << 11) - 1);
394 regcache_raw_supply (regcache
, r
, (char *) &l
);
397 regcache_raw_supply (regcache
, r
, context_offset
);
400 for (r
= 0; r
< gdbarch_num_regs (current_gdbarch
); r
++)
401 do_win32_fetch_inferior_registers (regcache
, r
);
404 #undef I387_ST0_REGNUM
408 win32_fetch_inferior_registers (struct regcache
*regcache
, int r
)
410 current_thread
= thread_rec (PIDGET (inferior_ptid
), TRUE
);
411 /* Check if current_thread exists. Windows sometimes uses a non-existent
412 thread id in its events */
414 do_win32_fetch_inferior_registers (regcache
, r
);
418 do_win32_store_inferior_registers (const struct regcache
*regcache
, int r
)
421 /* Windows sometimes uses a non-existent thread id in its events */;
423 regcache_raw_collect (regcache
, r
,
424 ((char *) ¤t_thread
->context
) + mappings
[r
]);
427 for (r
= 0; r
< gdbarch_num_regs (current_gdbarch
); r
++)
428 do_win32_store_inferior_registers (regcache
, r
);
432 /* Store a new register value into the current thread context */
434 win32_store_inferior_registers (struct regcache
*regcache
, int r
)
436 current_thread
= thread_rec (PIDGET (inferior_ptid
), TRUE
);
437 /* Check if current_thread exists. Windows sometimes uses a non-existent
438 thread id in its events */
440 do_win32_store_inferior_registers (regcache
, r
);
443 static int psapi_loaded
= 0;
444 static HMODULE psapi_module_handle
= NULL
;
445 static BOOL
WINAPI (*psapi_EnumProcessModules
) (HANDLE
, HMODULE
*, DWORD
, LPDWORD
) = NULL
;
446 static BOOL
WINAPI (*psapi_GetModuleInformation
) (HANDLE
, HMODULE
, LPMODULEINFO
, DWORD
) = NULL
;
447 static DWORD
WINAPI (*psapi_GetModuleFileNameExA
) (HANDLE
, HMODULE
, LPSTR
, DWORD
) = NULL
;
450 psapi_get_dll_name (DWORD BaseAddress
, char *dll_name_ret
)
456 HMODULE
*DllHandle
= dh_buf
;
461 psapi_EnumProcessModules
== NULL
||
462 psapi_GetModuleInformation
== NULL
||
463 psapi_GetModuleFileNameExA
== NULL
)
468 psapi_module_handle
= LoadLibrary ("psapi.dll");
469 if (!psapi_module_handle
)
471 /* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ()); */
474 psapi_EnumProcessModules
= GetProcAddress (psapi_module_handle
, "EnumProcessModules");
475 psapi_GetModuleInformation
= GetProcAddress (psapi_module_handle
, "GetModuleInformation");
476 psapi_GetModuleFileNameExA
= (void *) GetProcAddress (psapi_module_handle
,
477 "GetModuleFileNameExA");
478 if (psapi_EnumProcessModules
== NULL
||
479 psapi_GetModuleInformation
== NULL
||
480 psapi_GetModuleFileNameExA
== NULL
)
485 ok
= (*psapi_EnumProcessModules
) (current_process_handle
,
490 if (!ok
|| !cbNeeded
)
493 DllHandle
= (HMODULE
*) alloca (cbNeeded
);
497 ok
= (*psapi_EnumProcessModules
) (current_process_handle
,
504 for (i
= 0; i
< (int) (cbNeeded
/ sizeof (HMODULE
)); i
++)
506 if (!(*psapi_GetModuleInformation
) (current_process_handle
,
510 error (_("Can't get module info"));
512 len
= (*psapi_GetModuleFileNameExA
) (current_process_handle
,
517 error (_("Error getting dll name: %u."), (unsigned) GetLastError ());
519 if ((DWORD
) (mi
.lpBaseOfDll
) == BaseAddress
)
524 dll_name_ret
[0] = '\0';
528 /* Encapsulate the information required in a call to
529 symbol_file_add_args */
530 struct safe_symbol_file_add_args
534 struct section_addr_info
*addrs
;
537 struct ui_file
*err
, *out
;
541 /* Maintain a linked list of "so" information. */
547 static struct so_list solib_start
, *solib_end
;
549 /* Call symbol_file_add with stderr redirected. We don't care if there
552 safe_symbol_file_add_stub (void *argv
)
554 #define p ((struct safe_symbol_file_add_args *) argv)
555 struct so_list
*so
= &solib_start
;
557 p
->ret
= symbol_file_add (p
->name
, p
->from_tty
, p
->addrs
, p
->mainline
, p
->flags
);
562 /* Restore gdb's stderr after calling symbol_file_add */
564 safe_symbol_file_add_cleanup (void *p
)
566 #define sp ((struct safe_symbol_file_add_args *)p)
567 gdb_flush (gdb_stderr
);
568 gdb_flush (gdb_stdout
);
569 ui_file_delete (gdb_stderr
);
570 ui_file_delete (gdb_stdout
);
571 gdb_stderr
= sp
->err
;
572 gdb_stdout
= sp
->out
;
576 /* symbol_file_add wrapper that prevents errors from being displayed. */
577 static struct objfile
*
578 safe_symbol_file_add (char *name
, int from_tty
,
579 struct section_addr_info
*addrs
,
580 int mainline
, int flags
)
582 struct safe_symbol_file_add_args p
;
583 struct cleanup
*cleanup
;
585 cleanup
= make_cleanup (safe_symbol_file_add_cleanup
, &p
);
589 gdb_flush (gdb_stderr
);
590 gdb_flush (gdb_stdout
);
591 gdb_stderr
= ui_file_new ();
592 gdb_stdout
= ui_file_new ();
594 p
.from_tty
= from_tty
;
596 p
.mainline
= mainline
;
598 catch_errors (safe_symbol_file_add_stub
, &p
, "", RETURN_MASK_ERROR
);
600 do_cleanups (cleanup
);
604 static struct so_list
*
605 win32_make_so (const char *name
, DWORD load_addr
)
608 char buf
[MAX_PATH
+ 1];
609 char cwd
[MAX_PATH
+ 1];
611 WIN32_FIND_DATA w32_fd
;
612 HANDLE h
= FindFirstFile(name
, &w32_fd
);
613 MEMORY_BASIC_INFORMATION m
;
615 if (h
== INVALID_HANDLE_VALUE
)
621 if (GetCurrentDirectory (MAX_PATH
+ 1, cwd
))
623 p
= strrchr (buf
, '\\');
626 SetCurrentDirectory (buf
);
627 GetFullPathName (w32_fd
.cFileName
, MAX_PATH
, buf
, &p
);
628 SetCurrentDirectory (cwd
);
632 if (strcasecmp (buf
, "ntdll.dll") == 0)
634 GetSystemDirectory (buf
, sizeof (buf
));
635 strcat (buf
, "\\ntdll.dll");
637 so
= XZALLOC (struct so_list
);
638 so
->lm_info
= (struct lm_info
*) xmalloc (sizeof (struct lm_info
));
639 so
->lm_info
->load_addr
= load_addr
;
640 cygwin_conv_to_posix_path (buf
, so
->so_name
);
641 strcpy (so
->so_original_name
, name
);
643 /* Record cygwin1.dll .text start/end. */
644 p
= strchr (so
->so_name
, '\0') - (sizeof ("/cygwin1.dll") - 1);
645 if (p
>= so
->so_name
&& strcasecmp (p
, "/cygwin1.dll") == 0)
648 asection
*text
= NULL
;
651 abfd
= bfd_openr (name
, "pei-i386");
656 if (bfd_check_format (abfd
, bfd_object
))
657 text
= bfd_get_section_by_name (abfd
, ".text");
665 /* The symbols in a dll are offset by 0x1000, which is the the
666 offset from 0 of the first byte in an image - because of the
667 file header and the section alignment. */
668 cygwin_load_start
= load_addr
+ 0x1000;
669 cygwin_load_end
= cygwin_load_start
+ bfd_section_size (abfd
, text
);
678 get_image_name (HANDLE h
, void *address
, int unicode
)
680 static char buf
[(2 * MAX_PATH
) + 1];
681 DWORD size
= unicode
? sizeof (WCHAR
) : sizeof (char);
687 /* Attempt to read the name of the dll that was detected.
688 This is documented to work only when actively debugging
689 a program. It will not work for attached processes. */
693 /* See if we could read the address of a string, and that the
694 address isn't null. */
695 if (!ReadProcessMemory (h
, address
, &address_ptr
, sizeof (address_ptr
), &done
)
696 || done
!= sizeof (address_ptr
) || !address_ptr
)
699 /* Find the length of the string */
700 while (ReadProcessMemory (h
, address_ptr
+ len
++ * size
, &b
, size
, &done
)
701 && (b
[0] != 0 || b
[size
- 1] != 0) && done
== size
)
705 ReadProcessMemory (h
, address_ptr
, buf
, len
, &done
);
708 WCHAR
*unicode_address
= (WCHAR
*) alloca (len
* sizeof (WCHAR
));
709 ReadProcessMemory (h
, address_ptr
, unicode_address
, len
* sizeof (WCHAR
),
712 WideCharToMultiByte (CP_ACP
, 0, unicode_address
, len
, buf
, len
, 0, 0);
718 /* Wait for child to do something. Return pid of child, or -1 in case
719 of error; store status through argument pointer OURSTATUS. */
721 handle_load_dll (void *dummy
)
723 LOAD_DLL_DEBUG_INFO
*event
= ¤t_event
.u
.LoadDll
;
724 char dll_buf
[MAX_PATH
+ 1];
725 char *dll_name
= NULL
;
727 dll_buf
[0] = dll_buf
[sizeof (dll_buf
) - 1] = '\0';
729 if (!psapi_get_dll_name ((DWORD
) (event
->lpBaseOfDll
), dll_buf
))
730 dll_buf
[0] = dll_buf
[sizeof (dll_buf
) - 1] = '\0';
734 if (*dll_name
== '\0')
735 dll_name
= get_image_name (current_process_handle
,
736 event
->lpImageName
, event
->fUnicode
);
740 solib_end
->next
= win32_make_so (dll_name
, (DWORD
) event
->lpBaseOfDll
);
741 solib_end
= solib_end
->next
;
747 win32_free_so (struct so_list
*so
)
755 handle_unload_dll (void *dummy
)
757 DWORD lpBaseOfDll
= (DWORD
) current_event
.u
.UnloadDll
.lpBaseOfDll
;
760 for (so
= &solib_start
; so
->next
!= NULL
; so
= so
->next
)
761 if (so
->next
->lm_info
->load_addr
== lpBaseOfDll
)
763 struct so_list
*sodel
= so
->next
;
764 so
->next
= sodel
->next
;
767 win32_free_so (sodel
);
768 solib_add (NULL
, 0, NULL
, auto_solib_add
);
772 error (_("Error: dll starting at 0x%lx not found."), (DWORD
) lpBaseOfDll
);
777 /* Clear list of loaded DLLs. */
779 win32_clear_solib (void)
781 solib_start
.next
= NULL
;
782 solib_end
= &solib_start
;
785 /* Load DLL symbol info. */
787 dll_symbol_command (char *args
, int from_tty
)
793 error (_("dll-symbols requires a file name"));
796 if (n
> 4 && strcasecmp (args
+ n
- 4, ".dll") != 0)
798 char *newargs
= (char *) alloca (n
+ 4 + 1);
799 strcpy (newargs
, args
);
800 strcat (newargs
, ".dll");
804 safe_symbol_file_add (args
, from_tty
, NULL
, 0, OBJF_SHARED
| OBJF_USERLOADED
);
807 /* Handle DEBUG_STRING output from child process.
808 Cygwin prepends its messages with a "cygwin:". Interpret this as
809 a Cygwin signal. Otherwise just print the string as a warning. */
811 handle_output_debug_string (struct target_waitstatus
*ourstatus
)
816 if (!target_read_string
817 ((CORE_ADDR
) current_event
.u
.DebugString
.lpDebugStringData
, &s
, 1024, 0)
820 else if (strncmp (s
, _CYGWIN_SIGNAL_STRING
, sizeof (_CYGWIN_SIGNAL_STRING
) - 1) != 0)
822 if (strncmp (s
, "cYg", 3) != 0)
825 #ifdef __COPY_CONTEXT_SIZE
828 /* Got a cygwin signal marker. A cygwin signal is followed by the signal number
829 itself and then optionally followed by the thread id and address to saved context
830 within the DLL. If these are supplied, then the given thread is assumed to have
831 issued the signal and the context from the thread is assumed to be stored at the
832 given address in the inferior. Tell gdb to treat this like a real signal. */
834 int sig
= strtol (s
+ sizeof (_CYGWIN_SIGNAL_STRING
) - 1, &p
, 0);
835 int gotasig
= target_signal_from_host (sig
);
836 ourstatus
->value
.sig
= gotasig
;
841 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
842 retval
= strtoul (p
, &p
, 0);
844 retval
= main_thread_id
;
845 else if ((x
= (LPCVOID
) strtoul (p
, &p
, 0))
846 && ReadProcessMemory (current_process_handle
, x
,
847 &saved_context
, __COPY_CONTEXT_SIZE
, &n
)
848 && n
== __COPY_CONTEXT_SIZE
)
849 have_saved_context
= 1;
850 current_event
.dwThreadId
= retval
;
861 display_selector (HANDLE thread
, DWORD sel
)
864 if (GetThreadSelectorEntry (thread
, sel
, &info
))
867 printf_filtered ("0x%03lx: ", sel
);
868 if (!info
.HighWord
.Bits
.Pres
)
870 puts_filtered ("Segment not present\n");
873 base
= (info
.HighWord
.Bits
.BaseHi
<< 24) +
874 (info
.HighWord
.Bits
.BaseMid
<< 16)
876 limit
= (info
.HighWord
.Bits
.LimitHi
<< 16) + info
.LimitLow
;
877 if (info
.HighWord
.Bits
.Granularity
)
878 limit
= (limit
<< 12) | 0xfff;
879 printf_filtered ("base=0x%08x limit=0x%08x", base
, limit
);
880 if (info
.HighWord
.Bits
.Default_Big
)
881 puts_filtered(" 32-bit ");
883 puts_filtered(" 16-bit ");
884 switch ((info
.HighWord
.Bits
.Type
& 0xf) >> 1)
887 puts_filtered ("Data (Read-Only, Exp-up");
890 puts_filtered ("Data (Read/Write, Exp-up");
893 puts_filtered ("Unused segment (");
896 puts_filtered ("Data (Read/Write, Exp-down");
899 puts_filtered ("Code (Exec-Only, N.Conf");
902 puts_filtered ("Code (Exec/Read, N.Conf");
905 puts_filtered ("Code (Exec-Only, Conf");
908 puts_filtered ("Code (Exec/Read, Conf");
911 printf_filtered ("Unknown type 0x%x",info
.HighWord
.Bits
.Type
);
913 if ((info
.HighWord
.Bits
.Type
& 0x1) == 0)
914 puts_filtered(", N.Acc");
915 puts_filtered (")\n");
916 if ((info
.HighWord
.Bits
.Type
& 0x10) == 0)
917 puts_filtered("System selector ");
918 printf_filtered ("Priviledge level = %d. ", info
.HighWord
.Bits
.Dpl
);
919 if (info
.HighWord
.Bits
.Granularity
)
920 puts_filtered ("Page granular.\n");
922 puts_filtered ("Byte granular.\n");
927 printf_filtered ("Invalid selector 0x%lx.\n",sel
);
933 display_selectors (char * args
, int from_tty
)
937 puts_filtered ("Impossible to display selectors now.\n");
943 puts_filtered ("Selector $cs\n");
944 display_selector (current_thread
->h
,
945 current_thread
->context
.SegCs
);
946 puts_filtered ("Selector $ds\n");
947 display_selector (current_thread
->h
,
948 current_thread
->context
.SegDs
);
949 puts_filtered ("Selector $es\n");
950 display_selector (current_thread
->h
,
951 current_thread
->context
.SegEs
);
952 puts_filtered ("Selector $ss\n");
953 display_selector (current_thread
->h
,
954 current_thread
->context
.SegSs
);
955 puts_filtered ("Selector $fs\n");
956 display_selector (current_thread
->h
,
957 current_thread
->context
.SegFs
);
958 puts_filtered ("Selector $gs\n");
959 display_selector (current_thread
->h
,
960 current_thread
->context
.SegGs
);
965 sel
= parse_and_eval_long (args
);
966 printf_filtered ("Selector \"%s\"\n",args
);
967 display_selector (current_thread
->h
, sel
);
971 static struct cmd_list_element
*info_w32_cmdlist
= NULL
;
974 info_w32_command (char *args
, int from_tty
)
976 help_list (info_w32_cmdlist
, "info w32 ", class_info
, gdb_stdout
);
980 #define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
981 printf_unfiltered ("gdb: Target exception %s at 0x%08lx\n", x, \
982 (DWORD) current_event.u.Exception.ExceptionRecord.ExceptionAddress)
985 handle_exception (struct target_waitstatus
*ourstatus
)
988 DWORD code
= current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
;
990 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
992 /* Record the context of the current thread */
993 th
= thread_rec (current_event
.dwThreadId
, -1);
997 case EXCEPTION_ACCESS_VIOLATION
:
998 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
999 ourstatus
->value
.sig
= TARGET_SIGNAL_SEGV
;
1001 /* See if the access violation happened within the cygwin DLL itself. Cygwin uses
1002 a kind of exception handling to deal with passed-in invalid addresses. gdb
1003 should not treat these as real SEGVs since they will be silently handled by
1004 cygwin. A real SEGV will (theoretically) be caught by cygwin later in the process
1005 and will be sent as a cygwin-specific-signal. So, ignore SEGVs if they show up
1006 within the text segment of the DLL itself. */
1008 bfd_vma addr
= (bfd_vma
) current_event
.u
.Exception
.ExceptionRecord
.ExceptionAddress
;
1009 if ((!cygwin_exceptions
&& (addr
>= cygwin_load_start
&& addr
< cygwin_load_end
))
1010 || (find_pc_partial_function (addr
, &fn
, NULL
, NULL
)
1011 && strncmp (fn
, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0))
1015 case STATUS_STACK_OVERFLOW
:
1016 DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
1017 ourstatus
->value
.sig
= TARGET_SIGNAL_SEGV
;
1019 case STATUS_FLOAT_DENORMAL_OPERAND
:
1020 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
1021 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1023 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED
:
1024 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
1025 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1027 case STATUS_FLOAT_INEXACT_RESULT
:
1028 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
1029 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1031 case STATUS_FLOAT_INVALID_OPERATION
:
1032 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
1033 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1035 case STATUS_FLOAT_OVERFLOW
:
1036 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
1037 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1039 case STATUS_FLOAT_STACK_CHECK
:
1040 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
1041 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1043 case STATUS_FLOAT_UNDERFLOW
:
1044 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
1045 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1047 case STATUS_FLOAT_DIVIDE_BY_ZERO
:
1048 DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
1049 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1051 case STATUS_INTEGER_DIVIDE_BY_ZERO
:
1052 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
1053 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1055 case STATUS_INTEGER_OVERFLOW
:
1056 DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
1057 ourstatus
->value
.sig
= TARGET_SIGNAL_FPE
;
1059 case EXCEPTION_BREAKPOINT
:
1060 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
1061 ourstatus
->value
.sig
= TARGET_SIGNAL_TRAP
;
1064 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
1065 ourstatus
->value
.sig
= TARGET_SIGNAL_INT
;
1067 case DBG_CONTROL_BREAK
:
1068 DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
1069 ourstatus
->value
.sig
= TARGET_SIGNAL_INT
;
1071 case EXCEPTION_SINGLE_STEP
:
1072 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
1073 ourstatus
->value
.sig
= TARGET_SIGNAL_TRAP
;
1075 case EXCEPTION_ILLEGAL_INSTRUCTION
:
1076 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
1077 ourstatus
->value
.sig
= TARGET_SIGNAL_ILL
;
1079 case EXCEPTION_PRIV_INSTRUCTION
:
1080 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
1081 ourstatus
->value
.sig
= TARGET_SIGNAL_ILL
;
1083 case EXCEPTION_NONCONTINUABLE_EXCEPTION
:
1084 DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
1085 ourstatus
->value
.sig
= TARGET_SIGNAL_ILL
;
1088 /* Treat unhandled first chance exceptions specially. */
1089 if (current_event
.u
.Exception
.dwFirstChance
)
1091 printf_unfiltered ("gdb: unknown target exception 0x%08lx at 0x%08lx\n",
1092 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
,
1093 (DWORD
) current_event
.u
.Exception
.ExceptionRecord
.ExceptionAddress
);
1094 ourstatus
->value
.sig
= TARGET_SIGNAL_UNKNOWN
;
1098 last_sig
= ourstatus
->value
.sig
;
1102 /* Resume all artificially suspended threads if we are continuing
1105 win32_continue (DWORD continue_status
, int id
)
1111 DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n",
1112 current_event
.dwProcessId
, current_event
.dwThreadId
,
1113 continue_status
== DBG_CONTINUE
?
1114 "DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
1115 res
= ContinueDebugEvent (current_event
.dwProcessId
,
1116 current_event
.dwThreadId
,
1119 for (th
= &thread_head
; (th
= th
->next
) != NULL
;)
1120 if (((id
== -1) || (id
== (int) th
->id
)) && th
->suspend_count
)
1123 for (i
= 0; i
< th
->suspend_count
; i
++)
1124 (void) ResumeThread (th
->h
);
1125 th
->suspend_count
= 0;
1126 if (debug_registers_changed
)
1128 /* Only change the value of the debug registers */
1129 th
->context
.ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
1130 th
->context
.Dr0
= dr
[0];
1131 th
->context
.Dr1
= dr
[1];
1132 th
->context
.Dr2
= dr
[2];
1133 th
->context
.Dr3
= dr
[3];
1134 /* th->context.Dr6 = dr[6];
1135 FIXME: should we set dr6 also ?? */
1136 th
->context
.Dr7
= dr
[7];
1137 CHECK (SetThreadContext (th
->h
, &th
->context
));
1138 th
->context
.ContextFlags
= 0;
1142 debug_registers_changed
= 0;
1146 /* Called in pathological case where Windows fails to send a
1147 CREATE_PROCESS_DEBUG_EVENT after an attach. */
1149 fake_create_process (void)
1151 current_process_handle
= OpenProcess (PROCESS_ALL_ACCESS
, FALSE
,
1152 current_event
.dwProcessId
);
1153 main_thread_id
= current_event
.dwThreadId
;
1154 current_thread
= win32_add_thread (main_thread_id
,
1155 current_event
.u
.CreateThread
.hThread
);
1156 return main_thread_id
;
1160 win32_resume (ptid_t ptid
, int step
, enum target_signal sig
)
1163 DWORD continue_status
= DBG_CONTINUE
;
1165 int pid
= PIDGET (ptid
);
1167 if (sig
!= TARGET_SIGNAL_0
)
1169 if (current_event
.dwDebugEventCode
!= EXCEPTION_DEBUG_EVENT
)
1171 DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig
));
1173 else if (sig
== last_sig
)
1174 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1177 /* This code does not seem to work, because
1178 the kernel does probably not consider changes in the ExceptionRecord
1179 structure when passing the exception to the inferior.
1180 Note that this seems possible in the exception handler itself. */
1183 for (i
= 0; xlate
[i
].them
!= -1; i
++)
1184 if (xlate
[i
].us
== sig
)
1186 current_event
.u
.Exception
.ExceptionRecord
.ExceptionCode
=
1188 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1191 if (continue_status
== DBG_CONTINUE
)
1193 DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig
));
1197 DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
1201 last_sig
= TARGET_SIGNAL_0
;
1203 DEBUG_EXEC (("gdb: win32_resume (pid=%d, step=%d, sig=%d);\n",
1206 /* Get context for currently selected thread */
1207 th
= thread_rec (current_event
.dwThreadId
, FALSE
);
1212 /* Single step by setting t bit */
1213 win32_fetch_inferior_registers (get_current_regcache (),
1214 gdbarch_ps_regnum (current_gdbarch
));
1215 th
->context
.EFlags
|= FLAG_TRACE_BIT
;
1218 if (th
->context
.ContextFlags
)
1220 if (debug_registers_changed
)
1222 th
->context
.Dr0
= dr
[0];
1223 th
->context
.Dr1
= dr
[1];
1224 th
->context
.Dr2
= dr
[2];
1225 th
->context
.Dr3
= dr
[3];
1226 /* th->context.Dr6 = dr[6];
1227 FIXME: should we set dr6 also ?? */
1228 th
->context
.Dr7
= dr
[7];
1230 CHECK (SetThreadContext (th
->h
, &th
->context
));
1231 th
->context
.ContextFlags
= 0;
1235 /* Allow continuing with the same signal that interrupted us.
1236 Otherwise complain. */
1238 win32_continue (continue_status
, pid
);
1241 /* Get the next event from the child. Return 1 if the event requires
1242 handling by WFI (or whatever).
1245 get_win32_debug_event (int pid
, struct target_waitstatus
*ourstatus
)
1248 DWORD continue_status
, event_code
;
1250 static thread_info dummy_thread_info
;
1254 last_sig
= TARGET_SIGNAL_0
;
1256 if (!(debug_event
= WaitForDebugEvent (¤t_event
, 1000)))
1260 continue_status
= DBG_CONTINUE
;
1262 event_code
= current_event
.dwDebugEventCode
;
1263 ourstatus
->kind
= TARGET_WAITKIND_SPURIOUS
;
1265 have_saved_context
= 0;
1269 case CREATE_THREAD_DEBUG_EVENT
:
1270 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
1271 (unsigned) current_event
.dwProcessId
,
1272 (unsigned) current_event
.dwThreadId
,
1273 "CREATE_THREAD_DEBUG_EVENT"));
1274 if (saw_create
!= 1)
1276 if (!saw_create
&& attach_flag
)
1278 /* Kludge around a Windows bug where first event is a create
1279 thread event. Caused when attached process does not have
1281 retval
= ourstatus
->value
.related_pid
= fake_create_process ();
1286 /* Record the existence of this thread */
1287 th
= win32_add_thread (current_event
.dwThreadId
,
1288 current_event
.u
.CreateThread
.hThread
);
1290 printf_unfiltered ("[New %s]\n",
1292 pid_to_ptid (current_event
.dwThreadId
)));
1293 retval
= current_event
.dwThreadId
;
1296 case EXIT_THREAD_DEBUG_EVENT
:
1297 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1298 (unsigned) current_event
.dwProcessId
,
1299 (unsigned) current_event
.dwThreadId
,
1300 "EXIT_THREAD_DEBUG_EVENT"));
1301 if (current_event
.dwThreadId
!= main_thread_id
)
1303 win32_delete_thread (current_event
.dwThreadId
);
1304 th
= &dummy_thread_info
;
1308 case CREATE_PROCESS_DEBUG_EVENT
:
1309 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1310 (unsigned) current_event
.dwProcessId
,
1311 (unsigned) current_event
.dwThreadId
,
1312 "CREATE_PROCESS_DEBUG_EVENT"));
1313 CloseHandle (current_event
.u
.CreateProcessInfo
.hFile
);
1314 if (++saw_create
!= 1)
1316 CloseHandle (current_event
.u
.CreateProcessInfo
.hProcess
);
1320 current_process_handle
= current_event
.u
.CreateProcessInfo
.hProcess
;
1322 win32_delete_thread (main_thread_id
);
1323 main_thread_id
= current_event
.dwThreadId
;
1324 /* Add the main thread */
1325 th
= win32_add_thread (main_thread_id
,
1326 current_event
.u
.CreateProcessInfo
.hThread
);
1327 retval
= ourstatus
->value
.related_pid
= current_event
.dwThreadId
;
1330 case EXIT_PROCESS_DEBUG_EVENT
:
1331 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1332 (unsigned) current_event
.dwProcessId
,
1333 (unsigned) current_event
.dwThreadId
,
1334 "EXIT_PROCESS_DEBUG_EVENT"));
1335 if (saw_create
!= 1)
1337 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
1338 ourstatus
->value
.integer
= current_event
.u
.ExitProcess
.dwExitCode
;
1339 CloseHandle (current_process_handle
);
1340 retval
= main_thread_id
;
1343 case LOAD_DLL_DEBUG_EVENT
:
1344 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1345 (unsigned) current_event
.dwProcessId
,
1346 (unsigned) current_event
.dwThreadId
,
1347 "LOAD_DLL_DEBUG_EVENT"));
1348 CloseHandle (current_event
.u
.LoadDll
.hFile
);
1349 if (saw_create
!= 1)
1351 catch_errors (handle_load_dll
, NULL
, (char *) "", RETURN_MASK_ALL
);
1352 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1353 ourstatus
->value
.integer
= 0;
1354 retval
= main_thread_id
;
1357 case UNLOAD_DLL_DEBUG_EVENT
:
1358 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1359 (unsigned) current_event
.dwProcessId
,
1360 (unsigned) current_event
.dwThreadId
,
1361 "UNLOAD_DLL_DEBUG_EVENT"));
1362 if (saw_create
!= 1)
1364 catch_errors (handle_unload_dll
, NULL
, (char *) "", RETURN_MASK_ALL
);
1365 ourstatus
->kind
= TARGET_WAITKIND_LOADED
;
1366 ourstatus
->value
.integer
= 0;
1367 retval
= main_thread_id
;
1370 case EXCEPTION_DEBUG_EVENT
:
1371 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1372 (unsigned) current_event
.dwProcessId
,
1373 (unsigned) current_event
.dwThreadId
,
1374 "EXCEPTION_DEBUG_EVENT"));
1375 if (saw_create
!= 1)
1377 switch (handle_exception (ourstatus
))
1380 continue_status
= DBG_EXCEPTION_NOT_HANDLED
;
1383 retval
= current_event
.dwThreadId
;
1387 continue_status
= -1;
1392 case OUTPUT_DEBUG_STRING_EVENT
: /* message from the kernel */
1393 DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
1394 (unsigned) current_event
.dwProcessId
,
1395 (unsigned) current_event
.dwThreadId
,
1396 "OUTPUT_DEBUG_STRING_EVENT"));
1397 if (saw_create
!= 1)
1399 retval
= handle_output_debug_string (ourstatus
);
1403 if (saw_create
!= 1)
1405 printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
1406 (DWORD
) current_event
.dwProcessId
,
1407 (DWORD
) current_event
.dwThreadId
);
1408 printf_unfiltered (" unknown event code %ld\n",
1409 current_event
.dwDebugEventCode
);
1413 if (!retval
|| saw_create
!= 1)
1415 if (continue_status
== -1)
1416 win32_resume (ptid
, 0, 1);
1418 CHECK (win32_continue (continue_status
, -1));
1422 inferior_ptid
= pid_to_ptid (retval
);
1423 current_thread
= th
?: thread_rec (current_event
.dwThreadId
, TRUE
);
1430 /* Wait for interesting events to occur in the target process. */
1432 win32_wait (ptid_t ptid
, struct target_waitstatus
*ourstatus
)
1434 int pid
= PIDGET (ptid
);
1436 target_terminal_ours ();
1438 /* We loop when we get a non-standard exception rather than return
1439 with a SPURIOUS because resume can try and step or modify things,
1440 which needs a current_thread->h. But some of these exceptions mark
1441 the birth or death of threads, which mean that the current thread
1442 isn't necessarily what you think it is. */
1446 int retval
= get_win32_debug_event (pid
, ourstatus
);
1448 return pid_to_ptid (retval
);
1453 if (deprecated_ui_loop_hook
!= NULL
)
1454 detach
= deprecated_ui_loop_hook (0);
1457 win32_kill_inferior ();
1463 do_initial_win32_stuff (DWORD pid
)
1465 extern int stop_after_trap
;
1468 last_sig
= TARGET_SIGNAL_0
;
1470 exception_count
= 0;
1471 debug_registers_changed
= 0;
1472 debug_registers_used
= 0;
1473 for (i
= 0; i
< sizeof (dr
) / sizeof (dr
[0]); i
++)
1475 cygwin_load_start
= cygwin_load_end
= 0;
1476 current_event
.dwProcessId
= pid
;
1477 memset (¤t_event
, 0, sizeof (current_event
));
1478 push_target (&win32_ops
);
1479 disable_breakpoints_in_shlibs ();
1480 win32_clear_solib ();
1481 clear_proceed_status ();
1482 init_wait_for_inferior ();
1484 terminal_init_inferior_with_pgrp (pid
);
1485 target_terminal_inferior ();
1489 stop_after_trap
= 1;
1490 wait_for_inferior ();
1491 if (stop_signal
!= TARGET_SIGNAL_TRAP
)
1492 resume (0, stop_signal
);
1496 stop_after_trap
= 0;
1500 /* Since Windows XP, detaching from a process is supported by Windows.
1501 The following code tries loading the appropriate functions dynamically.
1502 If loading these functions succeeds use them to actually detach from
1503 the inferior process, otherwise behave as usual, pretending that
1504 detach has worked. */
1505 static BOOL
WINAPI (*DebugSetProcessKillOnExit
)(BOOL
);
1506 static BOOL
WINAPI (*DebugActiveProcessStop
)(DWORD
);
1509 has_detach_ability (void)
1511 static HMODULE kernel32
= NULL
;
1514 kernel32
= LoadLibrary ("kernel32.dll");
1517 if (!DebugSetProcessKillOnExit
)
1518 DebugSetProcessKillOnExit
= GetProcAddress (kernel32
,
1519 "DebugSetProcessKillOnExit");
1520 if (!DebugActiveProcessStop
)
1521 DebugActiveProcessStop
= GetProcAddress (kernel32
,
1522 "DebugActiveProcessStop");
1523 if (DebugSetProcessKillOnExit
&& DebugActiveProcessStop
)
1529 /* Try to set or remove a user privilege to the current process. Return -1
1530 if that fails, the previous setting of that privilege otherwise.
1532 This code is copied from the Cygwin source code and rearranged to allow
1533 dynamically loading of the needed symbols from advapi32 which is only
1534 available on NT/2K/XP. */
1536 set_process_privilege (const char *privilege
, BOOL enable
)
1538 static HMODULE advapi32
= NULL
;
1539 static BOOL
WINAPI (*OpenProcessToken
)(HANDLE
, DWORD
, PHANDLE
);
1540 static BOOL
WINAPI (*LookupPrivilegeValue
)(LPCSTR
, LPCSTR
, PLUID
);
1541 static BOOL
WINAPI (*AdjustTokenPrivileges
)(HANDLE
, BOOL
, PTOKEN_PRIVILEGES
,
1542 DWORD
, PTOKEN_PRIVILEGES
, PDWORD
);
1544 HANDLE token_hdl
= NULL
;
1546 TOKEN_PRIVILEGES new_priv
, orig_priv
;
1550 if (GetVersion () >= 0x80000000) /* No security availbale on 9x/Me */
1555 if (!(advapi32
= LoadLibrary ("advapi32.dll")))
1557 if (!OpenProcessToken
)
1558 OpenProcessToken
= GetProcAddress (advapi32
, "OpenProcessToken");
1559 if (!LookupPrivilegeValue
)
1560 LookupPrivilegeValue
= GetProcAddress (advapi32
,
1561 "LookupPrivilegeValueA");
1562 if (!AdjustTokenPrivileges
)
1563 AdjustTokenPrivileges
= GetProcAddress (advapi32
,
1564 "AdjustTokenPrivileges");
1565 if (!OpenProcessToken
|| !LookupPrivilegeValue
|| !AdjustTokenPrivileges
)
1572 if (!OpenProcessToken (GetCurrentProcess (),
1573 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
1577 if (!LookupPrivilegeValue (NULL
, privilege
, &restore_priv
))
1580 new_priv
.PrivilegeCount
= 1;
1581 new_priv
.Privileges
[0].Luid
= restore_priv
;
1582 new_priv
.Privileges
[0].Attributes
= enable
? SE_PRIVILEGE_ENABLED
: 0;
1584 if (!AdjustTokenPrivileges (token_hdl
, FALSE
, &new_priv
,
1585 sizeof orig_priv
, &orig_priv
, &size
))
1588 /* Disabled, otherwise every `attach' in an unprivileged user session
1589 would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
1591 /* AdjustTokenPrivileges returns TRUE even if the privilege could not
1592 be enabled. GetLastError () returns an correct error code, though. */
1593 if (enable
&& GetLastError () == ERROR_NOT_ALL_ASSIGNED
)
1597 ret
= orig_priv
.Privileges
[0].Attributes
== SE_PRIVILEGE_ENABLED
? 1 : 0;
1601 CloseHandle (token_hdl
);
1606 /* Attach to process PID, then initialize for debugging it. */
1608 win32_attach (char *args
, int from_tty
)
1614 error_no_arg (_("process-id to attach"));
1616 if (set_process_privilege (SE_DEBUG_NAME
, TRUE
) < 0)
1618 printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
1619 printf_unfiltered ("This can cause attach to fail on Windows NT/2K/XP\n");
1622 pid
= strtoul (args
, 0, 0); /* Windows pid */
1624 win32_init_thread_list ();
1625 ok
= DebugActiveProcess (pid
);
1630 /* Try fall back to Cygwin pid */
1631 pid
= cygwin_internal (CW_CYGWIN_PID_TO_WINPID
, pid
);
1634 ok
= DebugActiveProcess (pid
);
1637 error (_("Can't attach to process."));
1640 if (has_detach_ability ())
1641 DebugSetProcessKillOnExit (FALSE
);
1647 char *exec_file
= (char *) get_exec_file (0);
1650 printf_unfiltered ("Attaching to program `%s', %s\n", exec_file
,
1651 target_pid_to_str (pid_to_ptid (pid
)));
1653 printf_unfiltered ("Attaching to %s\n",
1654 target_pid_to_str (pid_to_ptid (pid
)));
1656 gdb_flush (gdb_stdout
);
1659 do_initial_win32_stuff (pid
);
1660 target_terminal_ours ();
1664 win32_detach (char *args
, int from_tty
)
1668 if (has_detach_ability ())
1671 win32_resume (ptid
, 0, TARGET_SIGNAL_0
);
1673 if (!DebugActiveProcessStop (current_event
.dwProcessId
))
1675 error (_("Can't detach process %lu (error %lu)"),
1676 current_event
.dwProcessId
, GetLastError ());
1679 DebugSetProcessKillOnExit (FALSE
);
1681 if (detached
&& from_tty
)
1683 char *exec_file
= get_exec_file (0);
1686 printf_unfiltered ("Detaching from program: %s, Pid %lu\n", exec_file
,
1687 current_event
.dwProcessId
);
1688 gdb_flush (gdb_stdout
);
1690 inferior_ptid
= null_ptid
;
1691 unpush_target (&win32_ops
);
1695 win32_pid_to_exec_file (int pid
)
1697 /* Try to find the process path using the Cygwin internal process list
1698 pid isn't a valid pid, unfortunately. Use current_event.dwProcessId
1700 /* TODO: Also find native Windows processes using CW_GETPINFO_FULL. */
1702 static char path
[MAX_PATH
+ 1];
1703 char *path_ptr
= NULL
;
1705 struct external_pinfo
*pinfo
;
1707 cygwin_internal (CW_LOCK_PINFO
, 1000);
1709 (pinfo
= (struct external_pinfo
*)
1710 cygwin_internal (CW_GETPINFO
, cpid
| CW_NEXTPID
));
1713 if (pinfo
->dwProcessId
== current_event
.dwProcessId
) /* Got it */
1715 cygwin_conv_to_full_posix_path (pinfo
->progname
, path
);
1720 cygwin_internal (CW_UNLOCK_PINFO
);
1724 /* Print status information about what we're accessing. */
1727 win32_files_info (struct target_ops
*ignore
)
1729 printf_unfiltered ("\tUsing the running image of %s %s.\n",
1730 attach_flag
? "attached" : "child", target_pid_to_str (inferior_ptid
));
1734 win32_open (char *arg
, int from_tty
)
1736 error (_("Use the \"run\" command to start a Unix child process."));
1739 /* Start an inferior win32 child process and sets inferior_ptid to its pid.
1740 EXEC_FILE is the file to run.
1741 ALLARGS is a string containing the arguments to the program.
1742 ENV is the environment vector to pass. Errors reported with error(). */
1745 win32_create_inferior (char *exec_file
, char *allargs
, char **in_env
,
1749 PROCESS_INFORMATION pi
;
1753 char real_path
[MAXPATHLEN
];
1755 char shell
[MAX_PATH
+ 1]; /* Path to shell */
1758 int ostdin
, ostdout
, ostderr
;
1759 const char *inferior_io_terminal
= get_inferior_io_terminal ();
1762 error (_("No executable specified, use `target exec'."));
1764 memset (&si
, 0, sizeof (si
));
1765 si
.cb
= sizeof (si
);
1769 flags
= DEBUG_ONLY_THIS_PROCESS
;
1770 cygwin_conv_to_win32_path (exec_file
, real_path
);
1776 sh
= getenv ("SHELL");
1779 cygwin_conv_to_win32_path (sh
, shell
);
1780 newallargs
= alloca (sizeof (" -c 'exec '") + strlen (exec_file
)
1781 + strlen (allargs
) + 2);
1782 sprintf (newallargs
, " -c 'exec %s %s'", exec_file
, allargs
);
1783 allargs
= newallargs
;
1785 flags
= DEBUG_PROCESS
;
1789 flags
|= CREATE_NEW_PROCESS_GROUP
;
1792 flags
|= CREATE_NEW_CONSOLE
;
1796 args
= alloca (strlen (toexec
) + strlen (allargs
) + 2);
1797 strcpy (args
, toexec
);
1799 strcat (args
, allargs
);
1801 /* Prepare the environment vars for CreateProcess. */
1802 cygwin_internal (CW_SYNC_WINENV
);
1804 if (!inferior_io_terminal
)
1805 tty
= ostdin
= ostdout
= ostderr
= -1;
1808 tty
= open (inferior_io_terminal
, O_RDWR
| O_NOCTTY
);
1811 print_sys_errmsg (inferior_io_terminal
, errno
);
1812 ostdin
= ostdout
= ostderr
= -1;
1825 win32_init_thread_list ();
1826 ret
= CreateProcess (0,
1827 args
, /* command line */
1828 NULL
, /* Security */
1830 TRUE
, /* inherit handles */
1831 flags
, /* start flags */
1832 NULL
, /* environment */
1833 NULL
, /* current directory */
1848 error (_("Error creating process %s, (error %d)."),
1849 exec_file
, (unsigned) GetLastError ());
1851 CloseHandle (pi
.hThread
);
1852 CloseHandle (pi
.hProcess
);
1854 if (useshell
&& shell
[0] != '\0')
1859 do_initial_win32_stuff (pi
.dwProcessId
);
1861 /* win32_continue (DBG_CONTINUE, -1); */
1865 win32_mourn_inferior (void)
1867 (void) win32_continue (DBG_CONTINUE
, -1);
1868 i386_cleanup_dregs();
1869 unpush_target (&win32_ops
);
1870 generic_mourn_inferior ();
1873 /* Send a SIGINT to the process group. This acts just like the user typed a
1874 ^C on the controlling terminal. */
1879 DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
1880 CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT
, current_event
.dwProcessId
));
1881 registers_changed (); /* refresh register state */
1885 win32_xfer_memory (CORE_ADDR memaddr
, gdb_byte
*our
, int len
,
1886 int write
, struct mem_attrib
*mem
,
1887 struct target_ops
*target
)
1892 DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08lx\n",
1893 len
, (DWORD
) memaddr
));
1894 if (!WriteProcessMemory (current_process_handle
, (LPVOID
) memaddr
, our
,
1897 FlushInstructionCache (current_process_handle
, (LPCVOID
) memaddr
, len
);
1901 DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08lx\n",
1902 len
, (DWORD
) memaddr
));
1903 if (!ReadProcessMemory (current_process_handle
, (LPCVOID
) memaddr
, our
,
1911 win32_kill_inferior (void)
1913 CHECK (TerminateProcess (current_process_handle
, 0));
1917 if (!win32_continue (DBG_CONTINUE
, -1))
1919 if (!WaitForDebugEvent (¤t_event
, INFINITE
))
1921 if (current_event
.dwDebugEventCode
== EXIT_PROCESS_DEBUG_EVENT
)
1925 CHECK (CloseHandle (current_process_handle
));
1927 /* this may fail in an attached process so don't check. */
1928 if (current_thread
&& current_thread
->h
)
1929 (void) CloseHandle (current_thread
->h
);
1930 target_mourn_inferior (); /* or just win32_mourn_inferior? */
1934 win32_prepare_to_store (struct regcache
*regcache
)
1936 /* Do nothing, since we can store individual regs */
1940 win32_can_run (void)
1948 DEBUG_EVENTS (("gdb: win32_close, inferior_ptid=%d\n",
1949 PIDGET (inferior_ptid
)));
1952 /* Convert pid to printable format. */
1954 cygwin_pid_to_str (ptid_t ptid
)
1956 static char buf
[80];
1957 int pid
= PIDGET (ptid
);
1959 if ((DWORD
) pid
== current_event
.dwProcessId
)
1960 sprintf (buf
, "process %d", pid
);
1962 sprintf (buf
, "thread %ld.0x%x", current_event
.dwProcessId
, pid
);
1967 win32_xfer_shared_libraries (struct target_ops
*ops
,
1968 enum target_object object
, const char *annex
,
1969 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1970 ULONGEST offset
, LONGEST len
)
1972 struct obstack obstack
;
1980 obstack_init (&obstack
);
1981 obstack_grow_str (&obstack
, "<library-list>\n");
1982 for (so
= solib_start
.next
; so
; so
= so
->next
)
1983 win32_xfer_shared_library (so
->so_name
, so
->lm_info
->load_addr
, &obstack
);
1984 obstack_grow_str0 (&obstack
, "</library-list>\n");
1986 buf
= obstack_finish (&obstack
);
1987 len_avail
= strlen (buf
);
1988 if (offset
>= len_avail
)
1991 if (len
> len_avail
- offset
)
1992 len
= len_avail
- offset
;
1993 memcpy (readbuf
, buf
+ offset
, len
);
1995 obstack_free (&obstack
, NULL
);
2000 win32_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2001 const char *annex
, gdb_byte
*readbuf
,
2002 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
2006 case TARGET_OBJECT_MEMORY
:
2008 return (*ops
->deprecated_xfer_memory
) (offset
, readbuf
,
2009 len
, 0/*write*/, NULL
, ops
);
2011 return (*ops
->deprecated_xfer_memory
) (offset
, (gdb_byte
*) writebuf
,
2012 len
, 1/*write*/, NULL
, ops
);
2015 case TARGET_OBJECT_LIBRARIES
:
2016 return win32_xfer_shared_libraries (ops
, object
, annex
, readbuf
,
2017 writebuf
, offset
, len
);
2020 if (ops
->beneath
!= NULL
)
2021 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
2022 readbuf
, writebuf
, offset
, len
);
2028 init_win32_ops (void)
2030 win32_ops
.to_shortname
= "child";
2031 win32_ops
.to_longname
= "Win32 child process";
2032 win32_ops
.to_doc
= "Win32 child process (started by the \"run\" command).";
2033 win32_ops
.to_open
= win32_open
;
2034 win32_ops
.to_close
= win32_close
;
2035 win32_ops
.to_attach
= win32_attach
;
2036 win32_ops
.to_detach
= win32_detach
;
2037 win32_ops
.to_resume
= win32_resume
;
2038 win32_ops
.to_wait
= win32_wait
;
2039 win32_ops
.to_fetch_registers
= win32_fetch_inferior_registers
;
2040 win32_ops
.to_store_registers
= win32_store_inferior_registers
;
2041 win32_ops
.to_prepare_to_store
= win32_prepare_to_store
;
2042 win32_ops
.deprecated_xfer_memory
= win32_xfer_memory
;
2043 win32_ops
.to_xfer_partial
= win32_xfer_partial
;
2044 win32_ops
.to_files_info
= win32_files_info
;
2045 win32_ops
.to_insert_breakpoint
= memory_insert_breakpoint
;
2046 win32_ops
.to_remove_breakpoint
= memory_remove_breakpoint
;
2047 win32_ops
.to_terminal_init
= terminal_init_inferior
;
2048 win32_ops
.to_terminal_inferior
= terminal_inferior
;
2049 win32_ops
.to_terminal_ours_for_output
= terminal_ours_for_output
;
2050 win32_ops
.to_terminal_ours
= terminal_ours
;
2051 win32_ops
.to_terminal_save_ours
= terminal_save_ours
;
2052 win32_ops
.to_terminal_info
= child_terminal_info
;
2053 win32_ops
.to_kill
= win32_kill_inferior
;
2054 win32_ops
.to_create_inferior
= win32_create_inferior
;
2055 win32_ops
.to_mourn_inferior
= win32_mourn_inferior
;
2056 win32_ops
.to_can_run
= win32_can_run
;
2057 win32_ops
.to_thread_alive
= win32_win32_thread_alive
;
2058 win32_ops
.to_pid_to_str
= cygwin_pid_to_str
;
2059 win32_ops
.to_stop
= win32_stop
;
2060 win32_ops
.to_stratum
= process_stratum
;
2061 win32_ops
.to_has_all_memory
= 1;
2062 win32_ops
.to_has_memory
= 1;
2063 win32_ops
.to_has_stack
= 1;
2064 win32_ops
.to_has_registers
= 1;
2065 win32_ops
.to_has_execution
= 1;
2066 win32_ops
.to_magic
= OPS_MAGIC
;
2067 win32_ops
.to_pid_to_exec_file
= win32_pid_to_exec_file
;
2071 set_win32_aliases (char *argv0
)
2073 add_info_alias ("dll", "sharedlibrary", 1);
2077 _initialize_win32_nat (void)
2079 struct cmd_list_element
*c
;
2083 c
= add_com ("dll-symbols", class_files
, dll_symbol_command
,
2084 _("Load dll library symbols from FILE."));
2085 set_cmd_completer (c
, filename_completer
);
2087 add_com_alias ("sharedlibrary", "dll-symbols", class_alias
, 1);
2089 add_setshow_boolean_cmd ("shell", class_support
, &useshell
, _("\
2090 Set use of shell to start subprocess."), _("\
2091 Show use of shell to start subprocess."), NULL
,
2093 NULL
, /* FIXME: i18n: */
2094 &setlist
, &showlist
);
2096 add_setshow_boolean_cmd ("cygwin-exceptions", class_support
, &cygwin_exceptions
, _("\
2097 Break when an exception is detected in the Cygwin DLL itself."), _("\
2098 Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL
,
2100 NULL
, /* FIXME: i18n: */
2101 &setlist
, &showlist
);
2103 add_setshow_boolean_cmd ("new-console", class_support
, &new_console
, _("\
2104 Set creation of new console when creating child process."), _("\
2105 Show creation of new console when creating child process."), NULL
,
2107 NULL
, /* FIXME: i18n: */
2108 &setlist
, &showlist
);
2110 add_setshow_boolean_cmd ("new-group", class_support
, &new_group
, _("\
2111 Set creation of new group when creating child process."), _("\
2112 Show creation of new group when creating child process."), NULL
,
2114 NULL
, /* FIXME: i18n: */
2115 &setlist
, &showlist
);
2117 add_setshow_boolean_cmd ("debugexec", class_support
, &debug_exec
, _("\
2118 Set whether to display execution in child process."), _("\
2119 Show whether to display execution in child process."), NULL
,
2121 NULL
, /* FIXME: i18n: */
2122 &setlist
, &showlist
);
2124 add_setshow_boolean_cmd ("debugevents", class_support
, &debug_events
, _("\
2125 Set whether to display kernel events in child process."), _("\
2126 Show whether to display kernel events in child process."), NULL
,
2128 NULL
, /* FIXME: i18n: */
2129 &setlist
, &showlist
);
2131 add_setshow_boolean_cmd ("debugmemory", class_support
, &debug_memory
, _("\
2132 Set whether to display memory accesses in child process."), _("\
2133 Show whether to display memory accesses in child process."), NULL
,
2135 NULL
, /* FIXME: i18n: */
2136 &setlist
, &showlist
);
2138 add_setshow_boolean_cmd ("debugexceptions", class_support
,
2139 &debug_exceptions
, _("\
2140 Set whether to display kernel exceptions in child process."), _("\
2141 Show whether to display kernel exceptions in child process."), NULL
,
2143 NULL
, /* FIXME: i18n: */
2144 &setlist
, &showlist
);
2146 add_prefix_cmd ("w32", class_info
, info_w32_command
,
2147 _("Print information specific to Win32 debugging."),
2148 &info_w32_cmdlist
, "info w32 ", 0, &infolist
);
2150 add_cmd ("selector", class_info
, display_selectors
,
2151 _("Display selectors infos."),
2153 add_target (&win32_ops
);
2154 deprecated_init_ui_hook
= set_win32_aliases
;
2157 /* Hardware watchpoint support, adapted from go32-nat.c code. */
2159 /* Pass the address ADDR to the inferior in the I'th debug register.
2160 Here we just store the address in dr array, the registers will be
2161 actually set up when win32_continue is called. */
2163 cygwin_set_dr (int i
, CORE_ADDR addr
)
2166 internal_error (__FILE__
, __LINE__
,
2167 _("Invalid register %d in cygwin_set_dr.\n"), i
);
2168 dr
[i
] = (unsigned) addr
;
2169 debug_registers_changed
= 1;
2170 debug_registers_used
= 1;
2173 /* Pass the value VAL to the inferior in the DR7 debug control
2174 register. Here we just store the address in D_REGS, the watchpoint
2175 will be actually set up in win32_wait. */
2177 cygwin_set_dr7 (unsigned val
)
2180 debug_registers_changed
= 1;
2181 debug_registers_used
= 1;
2184 /* Get the value of the DR6 debug status register from the inferior.
2185 Here we just return the value stored in dr[6]
2186 by the last call to thread_rec for current_event.dwThreadId id. */
2188 cygwin_get_dr6 (void)
2193 /* Determine if the thread referenced by "pid" is alive
2194 by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
2195 it means that the pid has died. Otherwise it is assumed to be alive. */
2197 win32_win32_thread_alive (ptid_t ptid
)
2199 int pid
= PIDGET (ptid
);
2201 return WaitForSingleObject (thread_rec (pid
, FALSE
)->h
, 0) == WAIT_OBJECT_0
?
2206 _initialize_check_for_gdb_ini (void)
2209 if (inhibit_gdbinit
)
2212 homedir
= getenv ("HOME");
2216 char *oldini
= (char *) alloca (strlen (homedir
) +
2217 sizeof ("/gdb.ini"));
2218 strcpy (oldini
, homedir
);
2219 p
= strchr (oldini
, '\0');
2220 if (p
> oldini
&& p
[-1] != '/')
2222 strcpy (p
, "gdb.ini");
2223 if (access (oldini
, 0) == 0)
2225 int len
= strlen (oldini
);
2226 char *newini
= alloca (len
+ 1);
2227 sprintf (newini
, "%.*s.gdbinit",
2228 (int) (len
- (sizeof ("gdb.ini") - 1)), oldini
);
2229 warning (_("obsolete '%s' found. Rename to '%s'."), oldini
, newini
);